Restore use of 'help.format' configuration property in 'git help'

diff --git a/convert.c b/convert.c
index 4534e2c2b003998a590637fc43c0549ff23f71b2..66021550c32f86e662fe5da84c852e80ae790450 100644 (file)
--- a/convert.c
+++ b/convert.c
@@ -452,6 +452,7 @@ static struct convert_driver {
        struct convert_driver *next;
        const char *smudge;
        const char *clean;
+       int required;
 } *user_convert, **user_convert_tail;
 
 static int read_convert_config(const char *var, const char *value, void *cb)
@@ -495,6 +496,11 @@ static int read_convert_config(const char *var, const char *value, void *cb)
        if (!strcmp("clean", ep))
                return git_config_string(&drv->clean, var, value);
 
+       if (!strcmp("required", ep)) {
+               drv->required = git_config_bool(var, value);
+               return 0;
+       }
+
        return 0;
 }
 
@@ -773,13 +779,19 @@ int convert_to_git(const char *path, const char *src, size_t len,
 {
        int ret = 0;
        const char *filter = NULL;
+       int required = 0;
        struct conv_attrs ca;
 
        convert_attrs(&ca, path);
-       if (ca.drv)
+       if (ca.drv) {
                filter = ca.drv->clean;
+               required = ca.drv->required;
+       }
 
        ret |= apply_filter(path, src, len, dst, filter);
+       if (!ret && required)
+               die("%s: clean filter '%s' failed", path, ca.drv->name);
+
        if (ret && dst) {
                src = dst->buf;
                len = dst->len;
@@ -797,13 +809,16 @@ static int convert_to_working_tree_internal(const char *path, const char *src,
                                            size_t len, struct strbuf *dst,
                                            int normalizing)
 {
-       int ret = 0;
+       int ret = 0, ret_filter = 0;
        const char *filter = NULL;
+       int required = 0;
        struct conv_attrs ca;
 
        convert_attrs(&ca, path);
-       if (ca.drv)
+       if (ca.drv) {
                filter = ca.drv->smudge;
+               required = ca.drv->required;
+       }
 
        ret |= ident_to_worktree(path, src, len, dst, ca.ident);
        if (ret) {
@@ -822,7 +837,12 @@ static int convert_to_working_tree_internal(const char *path, const char *src,
                        len = dst->len;
                }
        }
-       return ret | apply_filter(path, src, len, dst, filter);
+
+       ret_filter = apply_filter(path, src, len, dst, filter);
+       if (!ret_filter && required)
+               die("%s: smudge filter %s failed", path, ca.drv->name);
+
+       return ret | ret_filter;
 }
 
 int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst)